jim harbaugh's older brother john met with the media. the first contrast was their attire. >> the khakis and the fleece are new to jim since he got to san francisco. but it's a good look for him. he shared with me, it cuts down on drag time for the morning. psychological advantages, i'm not aware of any. no, i'm not too sure about all of that. we know each other pretty well. there's no secrets. >> reporter: often at super bowls, something emerges as the topic of the day. today's topic was the response to president obama about the risk of injury in football. >> i think if you play the game right, and you play appropriately that injuries are part of the game, but i don't think anything comes about it. >> i have a 4-month-old, almost soon to be 5-month-old son, jack harbaugh. and president obama feels that way, then be a little less competition for jack harbaugh when he gets old. still a little early for jack. 5 months old, but he's a really big kid. he's got an enormous head. >> what's his 40 time? >> we haven't gotten 40 out of him yet. b